http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Influence of γ-Al2O3 nano particles on the properties of washcoats deposited on cordierite monoliths
Shahram G. Pakdehi,Mozaffar Salimi,Maryam Rasoolzadeh,Mojtaba Abbasi 한양대학교 세라믹연구소 2015 Journal of Ceramic Processing Research Vol.16 No.5
The main aspects of washcoating of ceramic monolith by nano γ-Al2O3 slurry were studied. Some of the deposition characteristics of the washcoat such as morphology and homogeneity, specific load, thickness of the layer and adherence were examined. SEM was applied to assess the quality of the washcoat layer and measure its thickness. The adhesion of nano γ- Al2O3 washcoat on cordierite monolith was investigated by a vibrational ultrasonic and thermal shock tests. Nano γ-Al2O3 washcoat forms a good homogeneous layer on the monolith in comparison with the common micron size γ-Al2O3 particles, but some cracks appeared on washcoated layer.
Shahram G. Pakdehi,Abdolhamid Asadi,Mozaffar Salimi 한양대학교 세라믹연구소 2016 Journal of Ceramic Processing Research Vol.17 No.6
Ni/γ-Al2O3 nanocatalyst was synthesized by incipient wetness impregnation method for using in the catalytic decomposition ofhydrazine. To stabilize the catalyst, γ-Al2O3 support was precalcined which resulting 8% reduction in specific surface area. Thecatalyst was characterized by XRD, BET and TEM. The results showed that increasing the number of impregnation steps ledto a reduction in size of nickel particles. In addition, the number of impregnation steps had a direct effect on strength ofcatalyst and could reduce the catalyst loss. TPR analysis showed that Ni/γ-Al2O3 nanocatalyst was reduced at about 700 oC.